func (s *AvailabilityZoneSuite) TestBestAvailabilityZoneAllocationsAllInstancesErrors(c *gc.C) { resultErr := fmt.Errorf("oh noes") s.PatchValue(&s.env.allInstances, func() ([]instance.Instance, error) { return nil, resultErr }) best, err := common.BestAvailabilityZoneAllocations(&s.env, nil) c.Assert(err, gc.Equals, resultErr) c.Assert(best, gc.HasLen, 0) }
func (s *AvailabilityZoneSuite) TestBestAvailabilityZoneAllocationsPartialInstances(c *gc.C) { var called int s.PatchValue(&s.env.instanceAvailabilityZoneNames, func(ids []instance.Id) ([]string, error) { c.Assert(ids, gc.DeepEquals, []instance.Id{"nichts", "inst1", "null", "inst2"}) called++ return []string{"", "az1", "", "az1"}, environs.ErrPartialInstances }) best, err := common.BestAvailabilityZoneAllocations(&s.env, []instance.Id{"nichts", "inst1", "null", "inst2"}) c.Assert(called, gc.Equals, 1) c.Assert(err, gc.IsNil) // All known instances are in az1 and az0 is unavailable, so az2 is the best. c.Assert(best, gc.DeepEquals, map[string][]instance.Id{"az2": nil}) }
func (s *AvailabilityZoneSuite) TestBestAvailabilityZoneAllocationsInstanceAvailabilityZonesErrors(c *gc.C) { var returnErr error var called int s.PatchValue(&s.env.instanceAvailabilityZoneNames, func(ids []instance.Id) ([]string, error) { called++ return nil, returnErr }) errors := []error{environs.ErrNoInstances, fmt.Errorf("whatever")} for i, err := range errors { returnErr = err best, err := common.BestAvailabilityZoneAllocations(&s.env, nil) c.Assert(called, gc.Equals, i+1) c.Assert(err, gc.Equals, returnErr) c.Assert(best, gc.HasLen, 0) } }
func (s *AvailabilityZoneSuite) TestBestAvailabilityZoneAllocationsAllInstances(c *gc.C) { var called int s.PatchValue(&s.env.instanceAvailabilityZoneNames, func(ids []instance.Id) ([]string, error) { c.Assert(ids, gc.DeepEquals, []instance.Id{"inst0", "inst1", "inst2"}) called++ return []string{"az0", "az1", "az2"}, nil }) best, err := common.BestAvailabilityZoneAllocations(&s.env, nil) c.Assert(called, gc.Equals, 1) c.Assert(err, gc.IsNil) // az0 is unavailable, so az1 and az2 come out as equal best. c.Assert(best, gc.DeepEquals, map[string][]instance.Id{ "az1": []instance.Id{"inst1"}, "az2": []instance.Id{"inst2"}, }) }
func (s *AvailabilityZoneSuite) TestBestAvailabilityZoneAllocationsNoZones(c *gc.C) { var calls []string s.PatchValue(&s.env.instanceAvailabilityZoneNames, func(ids []instance.Id) ([]string, error) { c.Assert(ids, gc.DeepEquals, []instance.Id{"inst0", "inst1", "inst2"}) calls = append(calls, "InstanceAvailabilityZoneNames") return []string{"", "", ""}, nil }) s.PatchValue(&s.env.availabilityZones, func() ([]common.AvailabilityZone, error) { calls = append(calls, "AvailabilityZones") return []common.AvailabilityZone{}, nil }) best, err := common.BestAvailabilityZoneAllocations(&s.env, nil) c.Assert(calls, gc.DeepEquals, []string{"InstanceAvailabilityZoneNames", "AvailabilityZones"}) c.Assert(err, gc.IsNil) c.Assert(best, gc.HasLen, 0) }